.s-dcr-chapnav{--ink:#022430;--deep:#02668a;--sky:#2ea9e1;--fg-3:#5a6e7a;--border:#e1ebf1;--font:"Montserrat",system-ui,-apple-system,"Segoe UI",sans-serif;background:#fff;border-bottom:1px solid var(--border);box-shadow:0 1px 0 rgba(2,36,48,.04);font-family:var(--font);padding:0 clamp(16px,3vw,48px);position:sticky;top:0;z-index:30}.s-dcr-chapnav *{box-sizing:border-box}.s-dcr-chapnav__inner{align-items:center;display:flex;gap:16px;margin:0 auto;max-width:1240px;overflow-x:auto;scrollbar-width:thin}.s-dcr-chapnav__label{color:var(--fg-3);flex:0 0 auto;font-size:11px;font-weight:700;letter-spacing:.14em;padding:14px 0;text-transform:uppercase}.s-dcr-chapnav__link{align-items:center;border-bottom:2px solid transparent;color:var(--fg-3);display:flex;font-size:13px;font-weight:600;gap:8px;padding:14px 4px;text-decoration:none;transition:all .15s cubic-bezier(.2,.8,.2,1);white-space:nowrap}.s-dcr-chapnav__link:hover{color:var(--deep)}.s-dcr-chapnav__link.is-active{border-bottom-color:var(--sky);color:var(--deep)}.s-dcr-chapnav__num{color:var(--sky);font-family:JetBrains Mono,ui-monospace,monospace;font-size:11px;font-weight:600}@media (max-width:640px){.s-dcr-chapnav{padding:0 16px}.s-dcr-chapnav__label{font-size:10px}.s-dcr-chapnav__link{font-size:12px}}